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Science Quiz - Atoms and Elements 04 (Questions)

Atoms and elements form the foundation of chemistry. In KS3 Science, students discover how these tiny particles create substances with unique properties and uses.

Explore the Topic →

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Fascinating Fact:

Neon signs glow red-orange, but other colours come from adding different gases.

In KS3 Science, pupils explore how atoms combine to form elements and compounds, how these structures are arranged, and why this knowledge is vital in real-world chemistry.

Key Terms

Electron: A tiny particle with a negative charge that moves around the nucleus of an atom.
Compound: A substance formed when two or more different elements are chemically bonded.
Molecule: Two or more atoms joined together by chemical bonds.

Frequently Asked Questions (Click to see answers)

What is the difference between atoms and elements?

An atom is the smallest unit of matter, while an element is a pure substance made up of only one type of atom, like oxygen or gold.

Why do neon signs glow in different colours?

Neon gas glows red-orange. Other colours are made by using different gases, like argon for blue or helium for pinkish light.

How do atoms make up compounds?

Atoms make compounds when they bond by sharing or transferring electrons, creating new substances with properties different from the original elements.

Try These Related Quizzes

1.

A pure substance in which all of the atoms are identical is a description of .......

[ ]	a compound
[ ]	a mixture
[ ]	an alloy
[ ]	an element

2.

In the periodic table, the elements are arranged in order of increasing .......

[ ]	alphabetical symbol
[ ]	electron number
[ ]	mass number
[ ]	proton number

3.

The elements in group 7 of the periodic table are .......

[ ]	conductors
[ ]	gases
[ ]	metals
[ ]	non-metals

4.

The name of the element with the symbol Na is .......

[ ]	napthalene
[ ]	neon
[ ]	nickel
[ ]	sodium

5.

The name of a gas used in weather balloons is .......

[ ]	chlorine
[ ]	hydrogen
[ ]	neon
[ ]	nitrogen

6.

Which of the following is a halogen?

[ ]	Argon
[ ]	Fluorine
[ ]	Helium
[ ]	Neon

7.

Lithium floats on water as it .......

[ ]	is a non-metallic element
[ ]	is a solid
[ ]	is less dense than water
[ ]	is more dense than water

8.

Li, Na, K and Cs are group 1 elements. The most reactive is .......

[ ]	Cs
[ ]	K
[ ]	Li
[ ]	Na

9.

The following elements are named after countries except .......

[ ]	Fr
[ ]	Ge
[ ]	I
[ ]	Po

10.

The following elements are named after famous scientists except .......

[ ]	curium
[ ]	einsteinium
[ ]	nobelium
[ ]	uranium

You can find more about this topic by visiting BBC Bitesize - Atoms, elements and compounds

Science Quiz - Atoms and Elements 04 (Answers)

1.

A pure substance in which all of the atoms are identical is a description of .......

[ ]	a compound
[ ]	a mixture
[ ]	an alloy
[x]	an element

Atoms of the same element have the same number of protons in the nucleus as each other

2.

In the periodic table, the elements are arranged in order of increasing .......

[ ]	alphabetical symbol
[ ]	electron number
[ ]	mass number
[x]	proton number

Also called the atomic number, it also tells you how many electrons thare are in an atom

3.

The elements in group 7 of the periodic table are .......

[ ]	conductors
[ ]	gases
[ ]	metals
[x]	non-metals

Group 7 is also referred to in some periodic tables as group 17 and the chemicals of this group are called the halogens

4.

The name of the element with the symbol Na is .......

[ ]	napthalene
[ ]	neon
[ ]	nickel
[x]	sodium

This is a common symbol that you will come across dozens of times as you study science

5.

The name of a gas used in weather balloons is .......

[ ]	chlorine
[x]	hydrogen
[ ]	neon
[ ]	nitrogen

Both hydrogen and helium are less dense than air. Helium is used in airships as it is unreactive and so safer than hydrogen (check out the Hindenburg disaster). Hydrogen, however, is still used in weather balloons as it is cheaper than helium

6.

Which of the following is a halogen?

[ ]	Argon
[x]	Fluorine
[ ]	Helium
[ ]	Neon

The halogens are coloured elements - fluorine (symbol F) is a yellow-green gas

7.

Lithium floats on water as it .......

[ ]	is a non-metallic element
[ ]	is a solid
[x]	is less dense than water
[ ]	is more dense than water

Lithium is a metal in group 1 of the periodic table, its atoms contain three protons

8.

Li, Na, K and Cs are group 1 elements. The most reactive is .......

[x]	Cs
[ ]	K
[ ]	Li
[ ]	Na

The elements in group 1 increase in reactivity as you go down the group. You may have seen a video of this - caesium explodes and destroys the bowl of water

9.

The following elements are named after countries except .......

[ ]	Fr
[ ]	Ge
[x]	I
[ ]	Po

Fr Francium - France, Po Polonium - Poland, Ge Germanium - Germany. There are several more!! I is the chemical symbol for iodine, a dark purple solid that is a member of the group of elements called the halogens

10.

The following elements are named after famous scientists except .......

[ ]	curium
[ ]	einsteinium
[ ]	nobelium
[x]	uranium

Uranium was named after the planet Uranus